Home / 1,961.71-2,940.99-1,139.02

Finding the Fourth Proportional to 1,961.71, 2,940.99 and 1,139.02

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Solution

The fourth proportional to 1,961.71, 2,940.99 and 1,139.02 is: 1,707.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,961.71 : 2,940.99 = 1,139.02 : x
  2. Step 2: Convert to fraction form
    1,961.71/2,940.99 = 1,139.02/x
  3. Step 3: Cross multiply
    1,961.71x = 2,940.99 × 1,139.02
  4. Step 4: Simplify right side
    1,961.71x = 3,349,846.43
  5. Step 5: Solve for x
    x = 3,349,846.43/1,961.71
  6. Step 6: Final answer
    x = 1,707.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.